Isothermal Two-Phase H₂O–NaCl–CO₂ Simulation: Available Process in OGS or PFLOTRAN Coupling?

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Dear OGS Community,

I am currently conducting research on geological CO₂ storage and aim to simulate a subsurface system involving H₂O–NaCl–CO₂ under isothermal two-phase flow conditions, explicitly excluding any chemical reactions or geochemical processes.

Based on my review of the available capabilities, PFLOTRAN appears to provide the necessary governing equations to model such systems, including multi-phase, multi-component flow with salinity effects.

I would like to ask:

  1. Does OpenGeoSys currently support any process that can model this type of system — specifically, two-phase flow of water and CO₂ in the presence of dissolved salt (NaCl), under isothermal conditions and without geochemistry?
  2. If such a process is not yet available in OGS, is there any existing framework or ongoing development for coupling OGS with PFLOTRAN to leverage its multi-phase flow capabilities for this application? Any references to relevant coupling strategies, interface tools, or example benchmarks would be highly appreciated.

I am particularly interested in high-performance and extensible modeling approaches for future uncertainty analysis and scalability.

Thank you very much for your time and support.

Best regards,
Ting-Wei Ho